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The reaction A + 2B → C has a change in enthalpy of 34.5 kJ/mol, and...
The enthalpy of a certain reaction is +233 kj/mol and the entropy is +110J/molk. Above what temperature will the reaction be spontaneous. The enthalpy of a certain reaction is +233 kJ/mol, and the entropy is +110 J/mol K. Above what temperature will the reaction be spontaneous? 8.
If the reaction A + 2B ⇌ 2C has a change in enthalpy of ΔH=-8.71kJ/mol and a change in entropy of ΔS= -5.88J/mol*K and the reaction of B + D ⇌ C has a change in enthalpy of ΔH=-3.45kJ/mol and a change in entropy of ΔS= 11J/mol*K, is the reaction of A ⇌ 2D spontaneous at room temperature? Yes, ΔG > 0 Yes, ΔG < 0 No, ΔG > 0 No, ΔG < 0
A reaction has an enthalpy change of - 71 kJ mol" and an entropy change of -58 JK-mol-. At what temperature does this exothermic reaction cease to be spontaneous? 422°C 673°c 826°C O 951°C What is the molar reaction enthalpy for the reaction below: N2H4(0) +CHNO(0) 4CHẠO(g) +Ng(g) + 3H (g) given the following thermodynamic data? 2NH3(9) ► N2H4(l) + H2(9) A,Hm = 22.5 kJ mol-1 2NH3(9) N2(g) + 3H2(9) A Hm = 57.5 kJ mol-1 CH,0(9) + H2(g) +...
For a particular reaction, AH = -16.1 kJ/mol and AS = -21.8 J/(mol-K). Assuming these values change very little with temperature, at what temperature does the reaction change from no to spontaneous in the forward direction? 5 T= Is the reaction in the forward direction spontaneous at temperatures s greater than or less than the calculated temperature? less than O greater than
Consider a biochemical reaction under standard conditions. The change in enthalpy is -7 kJ/mol and the change in entropy is -25 JK^-1 mol^-1. Without doing any calculations, can you determine if the reaction is spontaneous? Calculate delta G^degree' for the reaction at 5 degree C. Is the reaction spontaneous or not? Why or why not? If not, does raising the temperature make the reaction more likely to be spontaneous, or less likely to be spontaneous?
A reaction has the activation energies of 34.5 and 52.7 kJ/mol for the forward and reverse steps, respectively. What is the energy change (AE-Eproducts- Ereactants) for this reaction? 43.6 kJ/mol O 18.2 kJ/mol O 87.2 kJ/mol O -18.2 kJ/mol O-87.2 kJ/mol
M14. For a particular reaction, the enthalpy change is AH° = +100 kJ/mol and the entropy change is AS° = + 100 J/mol K. What is the equilibrium constant at 300 K?
Thermodynamics Practice Problems 1. Predict the sign of AS.(positive or negative) for the following reactions a 2 Mg(s) +,(@) 2 Mgo (s) AS b. CH206(s) → 2C,H,OH(I) + 2003(g) AS c. 2 NH3(g) + CO2(g) → H2O(l) + NH CONH3(aq) AS d. Cu(s) (at 100°C) → Cu(s) (at 25°C) AS 2. Which two variables can indicate if a reaction is spontaneous or not? 3. The second law of thermodynamics tells us that: a Energy is conserved. b. The entropy of...
Calculate the change in enthalpy (in kJ) for the following theoretical reaction equation: A + 2B => 4C ΔH = ? Use the following information: 2D => A ΔH = +85 kJ 2C => B + D ΔH = -16 kJ B + 2D => 2E ΔH = +27 kJ ______________________________________________ Calculate the change in enthalpy (in kJ) for the following theoretical reaction equation: A + B => C + 3D ΔH = ? Use the following information: 3D +...
A substance melts with an enthalpy change of 75 kJ/mol and an entropy change of 98 J/K.mol. What is its melting temperature? A) 0.77 K B) 765 K C) 1.69 K D) 425 K E) 591 K